Illicit Discharge. Illicit discharges are illegal discharges to the storm sewer system and local water bodies. Please do not dump used oil, antifreeze, paint, pet waste, or other pollutants down the storm drain. Blow grass clippings back onto the lawn; sweep up fertilizer on streets, driveways, and sidewalks. Please report illegal dumping to the City immediately. Illicit Discharge Ordinance